Question

Factor 9b^2 - 4. (3b + 1)(3b - 4) (3b + 2)(3b - 2) (3b - 2)(3b - 2)

Answer 1

The answer should be (3b + 2)(3b - 2) since if you multiply those two, you will get back to original equation.

Hope this helps!

Answer 2

So for this, we will be applying the difference of squares, which is $x^2-y^2=(x+y)(x-y)$

In this case:

$9b^2-4=(3b+2)(3b-2)$

The correct answer is the second option.